Alongside one clip on Instagram, one fan, using the name triciajmartin, wrote in the caption, "This [expletive] snuck on Hanson's bus then spit on Zac's face.

She added, "He was just a random dude. Not a fan or anything. He was walking by the line, stopped to ask who we were seeing, and then started going off on us about how we didn't have a life because we were at a Hanson concert. Then Zac and Taylor came out of the venue and into the bus. He saw them, jumped on the bus behind one of Hanson's crew. He was on the bus for about 2 minutes, then the door opened up and Zac was shoving him out the door."